Question: Can I disable a insert
trigger for a SQL*Loader run and then "enable" the trigger:
Answer: Sometimes, you'll want to
turn off a trigger so data can be loaded more quickly. This
can be done by using the ALTER TRIGGER command in
SQL*Plus, as illustrated here:
ALTER TRIGGER STUDENTS_ARIU DISABLE;
If there is more than one trigger on a table and you want
to disable all the triggers in one fell swoop, you can use
the ALTER TABLE command shown here instead:
ALTER TABLE STUDENTS DISABLE ALL TRIGGERS;
Remember that when a trigger is disabled, data that is
loaded into the table isn't processed by the trigger at all.
The trigger doesn't even fire. Consequently, if your
triggers are validating data or enforcing complex business
rules, you run some risks by disabling triggers. Re-enabling
a trigger does not cause it to fire retroactively.
Database triggers can be turned on again by using the
same commands with ENABLE substituted for DISABLE,
as shown in the following:
ALTER TRIGGER STUDENTS_ARIU ENABLE;
ALTER TABLE STUDENTS ENABLE ALL TRIGGERS;
Naturally, executing these commands requires that you
have the proper privileges (ALTER TRIGGER, ALTER
TABLE, or ALTER ANY OBJECT).
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